refactor to change capacity data type

weed/shell/command_ec_common.go

@@ -282,10 +282,6 @@ func mountEcShards(grpcDialOption grpc.DialOption, collection string, volumeId n
 	})
 }
 
-func divide(total, n int) float64 {
-	return float64(total) / float64(n)
-}
-
 func ceilDivide(total, n int) int {
 	return int(math.Ceil(float64(total) / float64(n)))
 }

weed/shell/command_volume_balance.go

@@ -183,34 +183,34 @@ type Node struct {
 	rack            string
 }
 
-type CapacityFunc func(*master_pb.DataNodeInfo) int
+type CapacityFunc func(*master_pb.DataNodeInfo) float64
 
 func capacityByMaxVolumeCount(diskType types.DiskType) CapacityFunc {
-	return func(info *master_pb.DataNodeInfo) int {
+	return func(info *master_pb.DataNodeInfo) float64 {
 		diskInfo, found := info.DiskInfos[string(diskType)]
 		if !found {
 			return 0
 		}
-		return int(diskInfo.MaxVolumeCount)
+		return float64(diskInfo.MaxVolumeCount)
 	}
 }
 
 func capacityByFreeVolumeCount(diskType types.DiskType) CapacityFunc {
-	return func(info *master_pb.DataNodeInfo) int {
+	return func(info *master_pb.DataNodeInfo) float64 {
 		diskInfo, found := info.DiskInfos[string(diskType)]
 		if !found {
 			return 0
 		}
-		return int(diskInfo.MaxVolumeCount - diskInfo.VolumeCount)
+		return float64(diskInfo.MaxVolumeCount - diskInfo.VolumeCount)
 	}
 }
 
 func (n *Node) localVolumeRatio(capacityFunc CapacityFunc) float64 {
-	return divide(len(n.selectedVolumes), capacityFunc(n.info))
+	return float64(len(n.selectedVolumes)) / capacityFunc(n.info)
 }
 
 func (n *Node) localVolumeNextRatio(capacityFunc CapacityFunc) float64 {
-	return divide(len(n.selectedVolumes)+1, capacityFunc(n.info))
+	return float64(len(n.selectedVolumes)+1) / capacityFunc(n.info)
 }
 
 func (n *Node) isOneVolumeOnly() bool {
@@ -243,7 +243,7 @@ func sortWritableVolumes(volumes []*master_pb.VolumeInformationMessage) {
 }
 
 func balanceSelectedVolume(commandEnv *CommandEnv, diskType types.DiskType, volumeReplicas map[uint32][]*VolumeReplica, nodes []*Node, capacityFunc CapacityFunc, sortCandidatesFn func(volumes []*master_pb.VolumeInformationMessage), applyBalancing bool) (err error) {
-	selectedVolumeCount, volumeMaxCount := 0, 0
+	selectedVolumeCount, volumeMaxCount := 0, float64(0)
 	var nodesWithCapacity []*Node
 	for _, dn := range nodes {
 		selectedVolumeCount += len(dn.selectedVolumes)
@@ -254,7 +254,7 @@ func balanceSelectedVolume(commandEnv *CommandEnv, diskType types.DiskType, volu
 		volumeMaxCount += capacity
 	}
 
-	idealVolumeRatio := divide(selectedVolumeCount, volumeMaxCount)
+	idealVolumeRatio := float64(selectedVolumeCount) / volumeMaxCount
 
 	hasMoved := true